US3941069A - Automatic method and apparatus for closing the toe of seamless hose - Google Patents

Automatic method and apparatus for closing the toe of seamless hose Download PDF

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Publication number
US3941069A
US3941069A US05/477,824 US47782474A US3941069A US 3941069 A US3941069 A US 3941069A US 47782474 A US47782474 A US 47782474A US 3941069 A US3941069 A US 3941069A
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United States
Prior art keywords
hose
toe
suction tube
holding unit
finger pieces
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US05/477,824
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English (en)
Inventor
Yoshinobu Fukuyama
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TAKATORI MACHINERY WORKS Ltd
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TAKATORI MACHINERY WORKS Ltd
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Priority to US05/567,822 priority Critical patent/US3952673A/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B23/00—Sewing apparatus or machines not otherwise provided for
    • D05B23/007—Sewing units for assembling parts of knitted panties or closing the stocking toe part
    • D05B23/009—Toe closers
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices

Definitions

  • the present invention relates to an automatic method and apparatus for uniting seamless knitted hose so as to form the toe thereof and, more particularly, relates to an automatic method and apparatus for carrying out the toe-closing operation on a plurality of seamless knitted hose simultaneously by several successive operational steps which are carried out during one cycle of the travelling of said hose along an endless passage.
  • the toe portion is transferred from the fingers to a clamping device of a sewing mechanism for the toe-closing operation.
  • the hose is sucked into the tube with the closed toe end portion first so that the hose is reversed to its normal condition, with its outside facing out, and carried away by a suction air current to a successive working station.
  • the conventional toe-closing operation must include a cycle of operations having three individual steps for each stocking comprising: preparation for transferring the toe end portion of a hose to the clamping device of the sewing mechanism; toe-closing by the sewing mechanism and; carrying the completed stocking to the successive working station by utilizing a pneumatic conveyor.
  • One example of the conventional apparatus is the device as disclosed in the U.K. Pat. No. 1,039,104.
  • This apparatus comprises only one carrier in the form of an inspection leg member mounted on a frame and driven in a reciprocating movement by drive means in a housing, clamp means mounted on said frame and driven in a restricted rotary movement by drive means in a housing, and the toe-closing means in the form of cutting and sewing mechines.
  • this device it is necessary for the operator to manually turn the hose inside out and then draw the hose over the leg. This means that some of the operational steps are assigned to the operator, since the apparatus is incapable of performing them.
  • only one carrier for this apparatus only one hose can be toe-closed during one cycle of the operation of this apparatus. Hence, this apparatus is not a high production machine.
  • This apparatus comprises three smooth parallel tubes extending through a rotating disc, a pad of foam plastic which is engageable with the outer surface of any one of the tubes and is movable in the longitudinal direction of the tube, a transfer member and a sewing machine provided with a presser foot and a table surface.
  • the operator holds onto the welt end of the hose which is then sucked into the tube, and then he draws the hose onto the tube manually so that it is turned inside out.
  • the operator also manually pulls the toe-end forward and slides a short toe end portion of the hose onto two flat fingers of the transfer member.
  • the third step consists of sucking the hose into the tube, toe end first, and carrying the hose away by the suction air current, after the closed hose is slide backwards on the tube by means of the backward movement of the pag along the tube. Obviously, several manual operations are necessary within one cycle of this automatic toe-closing operation.
  • U.S. Pat. No. 3,420,196 comprises a conveyor means and a plurality of turning forms which are carried by said conveyor means, so that each of said turning forms carrying the hose can move from the receiving station A to the removal station C via a toe-closing station B.
  • This means there is no such concept that the toe portion of a hose is transferred from a carrying form to the clamping device of a sewing machine. Therefore this means that when the toe is closed with circular configuration it is convenient to hold the hose projected beyond the turning form as in the case of U.S. Pat. No. 3,738,294, because such hose may be moved and twisted without any resistance during the toe-closing, although this feature is not present in the present invention.
  • the principal object of the present invention is to eliminate the above-mentioned manual operations, that is, to provide a method and apparatus for carrying out the automatic toe-closing operation with a minimum of labor.
  • a conventional stationary automatic sewing machine is used, while a novel method is employed for transferring the toe end portion of each hose to the mechanism of said stationary sewing machine.
  • all of the hose holding units which are arranged parallel and horizontal, move along an oval endless passage. Said holding units travel along one section of said endless passage at a low speed, and then along the following section of said endless passage at a high speed, but when they reach the toe-closing position they remain stationary during the period of the toe-closing operation.
  • a definite advantage resides in the fact that the parallel and horizontal arrangement of the holding units is very suitable for the handling of the hose by operator during the arrangement of the seamless hose on the suction pipe and the turning of the welt portion of said hose inside out.
  • the advantage of the parallel and horizontal arrangement of the holding units in the present invention is that the operator need only move his left hand a short distance from his side and use his right hand only to pick up new hose to be toe-closed. This means the hand motions of the operator are very simple and that there is no necessity him to step away from his position. Therefore by utilizing the mechanism of the present invention, the toe-closing operation can be very satisfactorily carried out.
  • An operator picks up a welt portion of a seamless knitted hose, which is used for making a stocking, and holds its toe end in front of a suction tube so as to let the toe end of the hose be sucked into the suction tube. Then the hose is sucked into the suction tube, toe end first, while the operator holds the welt end portion of the hose.
  • a pair of finger pieces are provided which are capable of sliding along the suction tube in such a way that the finger pieces are retracted into a member rigidly supported by the suction tube when it is required, are capable of spreading laterally when required, and are also capable of projecting from said member along a path corresponding to an extension of the longitudinal axis of the suction tube.
  • This latter action causes the toe end portion of the hose to be displaced toward a clamping member of a sewing mechanism while the toe end portion of the hose is gradually spread out laterally in accordance with the above-mentioned motions of the finger pieces.
  • the toe end portion of the hose carried by the motion of the finger pieces is transferred to the clamping member of the sewing mechanism and is gripped by it without changing the above-mentioned laterally spread out condition thereof.
  • the welt portion of the hose is positioned at its rest position, and the toe portion is gripped by the clamping member of the sewing machine in a laterally spread out flat condition.
  • the sewing machine is actuated so that the toe-closing operation is carried out.
  • the grip by the clamping member is released so that the toe end portion of the hose is released from the grip member.
  • the hose is automatically drawn onto the outside of suction tube by means of a drawing-on mechanism.
  • the pneumatic system is actuated to apply a suction force to the suction tube so that the closed toe end portion is firstly sucked into the tube, while the hose drawn on the outside of the suction tube is positively withdrawn from there by means of a drawing off mechanism. According to this operation, the hose is completely drawn off from the outside of the suction tube and then, the hose is sucked into the suction tube and carried to the successive working station by the above-mentioned suction force.
  • the holding unit comprises a holding member consisting of a suction tube with support members, and a pair of finger pieces capable of sliding along the longitudinal axis of the suction tube in such a way that the finger pieces are retracted into the support member when it is required or projected beyond a free forward end of the support member when it is necessary to carry a toe end portion of the hose toward the clamping member of the sewing mechanism.
  • a supporting member consists of a pair of brackets holding the suction tube and a stay rod.
  • All of the holding units of the present invention are so arranged that they are parallel to each other and travel along the endless passage maintaining their horizontal relation.
  • said holding unit travels along one section of a half circle configuration of the endless passage at a low but constant speed, and along the following straight section at a high speed, which is double the lower speed.
  • the holding member rests there, until the toe-closing operation is completely carried out. When this is accomplished, it travels at a higher speed until it reaches the position where step G above can be carried out.
  • FIG. 1 is a perspective view of the general arrangement of the present invention
  • FIG. 2 is a developed and explanatory view showing each step within one cycle of the toe-closing operation of the present invention
  • FIG. 3 is a perspective view of a supporting part for a holding member
  • FIG. 4 is a detailed side view of a pawl for low speed
  • FIG. 5 is a sectional view of the arrangement of the loward frictional driving mechanisms for a holding unit
  • FIG. 6 is a similar sectional view to that of FIG. 5 but showing a high speed driving mechanism
  • FIG. 7 is a plane view of the mechanism of FIGS. 5 and 6;
  • FIG. 8 is a perspective view of a driving gearing
  • FIG. 9 is a side view of the holding member
  • FIG. 10 is a plane view of the holding member when a pair of finger pieces are located in their normal positions on a holding member;
  • FIG. 11 is a similar plane view to that of FIG. 10, except that the pair of finger pieces are spread out;
  • FIG. 12 is a front view of a support member
  • FIG. 13 is a plane view showing the relationships between the finger pieces which are spread out and the clump member of the sewing machine;
  • FIG. 14 is a side view showing the relationships between the finger pieces and the clamp member of the sewing machine as shown in FIG. 13;
  • FIG. 15 is the front view of a synchronous angular traversing apparatus for the drawing-on roller of the present invention.
  • FIG. 16 is a side view of the drawing-on roller when it is in operation
  • FIG. 17 is a view similar to that of FIG. 16, but when the drawing-on roller is not in operation;
  • FIG. 18 is a front view of a synchronous angular traversing apparatus for a suction pipe
  • FIG. 19 is a side view of the apparatus shown in FIG. 18;
  • FIG. 20 is a plane view of the winding-on mechanism after the toe-closing operation
  • FIG. 21 is a front view of the apparatus shown in FIG. 20;
  • FIG. 22 is a side view of the drawing-off mechanism after the toe-closing operation
  • FIG. 23 is a plane view of the apparatus shown in FIG. 22;
  • FIG. 24 is a wiring diagram for controlling the operations of the toe-closer.
  • the present toe-closer is provided with a pair of side frames 10.
  • On each of said frames an endless guide groove 11 with an oval configuration is provided, and these guide grooves 11 are so arranged that they face each other.
  • the holding member consists of a suction tube 30, a pair of finger pieces 31, 32 and also front and back brackets 44 (see FIG. 3) fixed on said suction tube.
  • the holding unit can be held by said grooves 11 on the frames 10 in such a manner that the axis of the tube 30 becomes perpendicular to the sides of the frames 10, so that a holding unit provided with a holding member can freely travel along the endless groove.
  • FIGS. 3 and 9 through 12 The detailed construction of the holding member is shown in FIGS. 3 and 9 through 12.
  • a support member 33 is fixedly mounted at the top of the suction tube 30 .
  • the support member 33 is provided with two guide slits 34 arranged symmetrically as shown in FIG. 12.
  • One of the bracket 44 is mounted at the back end and another at the middle of said suction tube, and between the two brackets 44 there is a back sliding member 37 mounted on the suction tube.
  • a front sliding member 36 mounted on the suction tube.
  • a pair of finger pieces 31, 32 are pivotally mounted on both sides of the front sliding member 36, while the front part of said pieces are slidably engaged with the two guide slits 34 of the support member 33.
  • a stud 38 is mounted, and said studs 38 of both pieces are so arranged that they can be engaged in two curved grooves 42 provided on a circular plate 40, and also they can slide in horizontal guide grooves 39 provided on the back sliding member 37.
  • These grooves 39 are arranged symmetrically and are perpendicular to the axis of the suction tube 30, so that by their relative displacement the front part of said pieces 31 and 32 can be projected laterally from the forward end of the support member 33, or retracted into the support member 33.
  • the width between the outermost edges of the two finger pieces 31 and 32 is W' when they are projected from the support member, and W when they are retracted into the support member.
  • the finger pieces 31 and 32 are so designed that their front edges and the front edge of the support member 33 are almost even when the finger pieces 31 and 32 are in their retracted or normal position. Therefore, both finger pieces 31 and 32 can be positioned with respect to the suction tube 30 as shown in FIG. 10.
  • the state of the holding member shown in FIG. 10 is hereinafter referred to as the ready condition
  • the state of the holding member shown in FIG. 11 is hereinafter referred to as the working condition.
  • position I of the holding unit is called the starting position
  • position II is called the intermediate position
  • position III is called the stationary position
  • position IV is called the drawn off position.
  • the travelling speed of a holding unit is low and constant from the time the holding unit starts from the position IV until it reaches position II, but from position II to position III its speed is faster.
  • the faster speed is selected twice the lower speed.
  • the holding unit is held stationary for the same length of time as was required for the unit to travel from positions I to II, for example three seconds.
  • This stationary state is released by the movement of the following holding unit after side to side contact of the units. That is, the following holding unit exerts a pushing force upon contact.
  • the pushed unit travels quickly along the endless passage by its own weight or assisted by some other positive driving means, so that it can reach position IV.
  • FIG. 2 One embodiment to induce the above-mentioned movement of a holding unit is shown in FIG. 2.
  • FIG. 2 there is a low speed chain 13 and a high speed chain 14.
  • Hooking member 248, 249 on a stay rod are so arranged that one of them can engage the chain 13, and the other can engage the chain 14, but they are in such a relationship that when one of them is in action the other is idle.
  • the hooking member 248 is engaged with the chain 13, while the hooking member 249 is out of engagement with the chain 14 and between the positions II and III the hooking member 249 is engaged with the chain 14, while the hooking member 248 is out of engagement with the chain 13.
  • the traveling speed of the holding unit is low between positions IV and II, and high between positions II and III.
  • the supporting part of the holding unit for supporting a holding member comprises a pair of brackets 44 with rollers 45, a stop pin 70 and three stay rods 46, 47 and 146, whereas, as shown in FIG. 10, said holding member consists of a suction tube 30 with a support member 33, front and back sliding members 36 and 37, and a pair of finger pieces 31 and 32.
  • Said stay rods 46 and 47 fixedly support a follower 49 and a pawl unit, which consists of a pawl 48, a body of pawl 148 and the spring 148' as shown in FIG. 4.
  • Said stay rod 146 acts as a guide rod for maintaining said holding member in a horizontal condition, by engaging with the sliding fork 137 of the back sliding member to said stay rod 146 as shown in FIG. 15.
  • a driving disc 115 is used instead of the combination of the low speed chain 13 and chain wheel 17 in FIG. 2.
  • the high speed chain 14 is also provided in this improved embodiment, but two projections 114, as shown in FIG. 8, are mounted on said chain 14.
  • a stopper lever 71 is pivotally mounted on a stud 72 fixed on the side of the frames 10, so that said holding unit, possessing inertial motion caused by being previously pushed by the high speed chain 14, can be stopped correctly at position III after said lever 71 engages a stop pin 70 provided on the bracket 44.
  • a friction drum 75 is employed, as shown in FIGS. 5, 7 and 8, the peripheral speed of said drum being three times the low traveling speed of said holding unit. Because of the frictional engagement of said drum 75 with the stop pin 70 on the bracket 44 between positions III and IV the holding unit can reliably and quickly travel to position IV.
  • the braking roller 73 which has a free running clutch mechanism, is mounted on each side frame 10 so that it can brake the movement of the supporting unit by engagement between the outer surface of said roller 73 and the surface of the stop pin 70 on the bracket 44 (shown in FIG. 3). Because this roller 73 can turn only in the counterclockwise direction, as shown in FIG. 6, due to its free running clutch mechanism, rebound of the supporting unit out of position IV, which would cause said roller to turn in the clockwise direction in FIG. 6 is prevented.
  • the gearing arrangement for turning the driving disc 115 includes chain wheel 17 and 18, and friction drum 75, as shown in FIG. 8.
  • a main shaft 120 is turned by the motor MTR 1 via a gear train including a gear 19 mounted on said main shaft 120.
  • a driving disc 115 is turned by the main shaft 120 via a gear train including a pinion 22 mounted on said main shaft, a driving drum gear 15' on the shaft 20, onto which a driving disc 115 is mounted, and an idle wheel.
  • the chain wheel 18 is mounted on the main shaft 120, and the gearing ratio between the pinion 22 and the gear 15' is so selected that, the traversing speed of the chain 14 driven by the chain wheel 18 is twice that of a holding unit whose movement induced by the driving disc 115 on the shaft 20.
  • the friction drum gear 16 mounted on the friction drum shaft 76, on which a friction drum 75 is also mounted, and said drum shaft, on which engagements friction drum 75 is also mounted, is turned by the main shaft via a gear train including a gear 19 mounted on the main shaft 120, a gear 16 mounted on said friction drum shaft 76 and two idle wheels mounted on a common idle shaft. From the gearing arrangement as mentioned above, the gearing ratio between the gear 16 and the gear 19 can be so selected that the traveling speed of the holding unit induced by the friction drum 75 is three times, the traveling speed of said holding unit induced by the driving disc 115.
  • the arrangements of the holding unit with the driving disc 115 and with the projection 114 on the chain 14, are made by the pawl 48 and the follower 49 respectively, both of which are fixedly mounted on the stay rods 46 and 47 of the supporting part as shown in FIG. 3, but the engagement of the holding unit with the friction drum 75 is made by the stop pin 70 mounted on the bracket 44.
  • the front and back sliding members 36 and 37, on which a pair of finger pieces 31 and 32 are mounted, are slidably mounted on the suction tube 30, so that said sliding members can be displaced along the longitudinal axis of said suction tube.
  • a projection 43 mounted on the top surface of the circular plate 40 is a projection 43 having a configuration as shown in FIGS. 10 and 11.
  • a top roller 41 is mounted so that its axis coincides with that of the plate 40.
  • a forward cam plate 82 is provided on the side frame 10, as shown in FIGS. 13 through 15.
  • a wider pin 80 which can contact one side of said projection 43 on the circular plate 40, while the cam surface of said plate 82 can contact the peripheral surface of the top roller 41.
  • a return roller 81 which can contact the side of said projection 43 opposite to the side previously contacted by said wider pin 80, is mounted on said plate 82 at a midway point of the stroke of a piston rod.
  • the front and back sliding members 36 and 37 together with a pair of finger pieces 31 and 32 are displaced longitudinally along the axis of the suction tube 30, as shown in FIG. 13.
  • an air cylinder 84 with a piston rod 85 and on the top portion of said rod 85 a backward hook member 83 is mounted. Said hook member 83 is so constructed that it engages the outside of the top roller 41.
  • the mechanism for inducing the angular movement of first drawing-on rollers 50 from position D 1 to position D 2 which movement is synchronous to the angular movement of a holding unit, is the same as the mechanism which moves the suction pipe 65 from position C 1 to position C 2 .
  • Angular displacing arms 53 and 67 as shown in FIGS. 15 and 18, are rotatably mounted on the shaft 20 outside of the frames 10.
  • T-shaped hook lever 54 is pivotably mounted by means of a pin.
  • One end of the horizontal part of each of said T-shaped hook lever 54 is formed into a hook 55, while the other end of said horizontal part is engaged by the spring 56.
  • a rest pin 57 is provided on each of said arms 53 and 67, so that the turning movement of said hook levers 54 by means of said spring 56 is stopped by these pins 57 when said pins 57 contact the side of the vertically extended portion of the arms 53 and 57.
  • said arms are supported by the supporters 59.
  • said position C 1 is the position I of the holding unit, while the position C 2 is somewhat higher than a horizontal plane passing through the center of shaft 20 in FIG. 18.
  • the position D 1 is on said horizontal plane, while the position D 2 is the position II of the holding unit in FIG. 15.
  • a releasing pin 58 is provided on the outside surface of both side frames 10, so that the engagement between the respective hooks 55 and the end of the stay rod 46 is released when the arm 53 arrives at the position D 2 or the arm 67 arrives at the position C 2 . After this disengagement occurs, the arms 53 and 67 are moved downwardly by their own weight, or in some case by the assistance of a spring not shown, and finally stop at their ready positions of D 1 and C 1 , respectively.
  • rollers for drawing-on or drawing-off hose 8 on the suction tube 30 there are three kinds of rollers for drawing-on or drawing-off hose 8 on the suction tube 30.
  • One of these kinds of rollers is a first drawing-on roller 50, as shown in detail in FIGS. 16 and 17.
  • There are two of these rollers 50 and both are supported by the swing arm 52 pivotally mounted on the body of the angular displacing arm 53.
  • Both of these rollers 50 are arranged on one shaft 98 positioned directly below the finger pieces. 31 and 32.
  • the shaft 98 is rotatably supported on the end of one arm of said swing arm 52, while on the other arm of said swing arm 52 a motor MTR 4 is mounted.
  • the rotations of said first drawing-on roller 50 are transmitted from the motor MTR 4 by means of a motor pulley 96 and a follower pulley 97 via a chain.
  • a sliding block 61 is slidably mounted on both the stepped portion 153 and the shaft 154.
  • a piston 155 is fixedly mounted.
  • an inner cylinder surface, within which said piston 155 moves, is provided so that a cavity 62 is defined by said surface and the piston 155, while at the opposite end of said sliding block 61 a cylindrical cavity 156, within which a spring 63 is housed, is formed.
  • a rod 64 is arranged between the arm of the swing arm 52 and the projection of the sliding block 61, and the two ends of said rod 64 are pivotally mounted by pins on the swing arm 52 and the block 61.
  • the second drawing-on roller 50' is arranged slightly downstream from position III, so that it can contact the surface of the suction tube 30 approximately midway between the front sliding member 36 and the support member 33.
  • This roller 50' is driven directly by the motor MTR6, and the roller 50' and motor MTR6 are swingably supported by a supporting pin 100 fixed on the side frame 10.
  • a helical torsion spring (not shown) arranged coaxial with said pin 100 causes the roller 50' and motor MTR6 to turn on the pin 100 so that the roller 50' moves towards and comes into contact with the surface of the suction tube 30 and the finger pieces 31 and 32 which are covered by the welt portion of the already toe-closed hose 8. This contact relation is continued from the time the holding unit is moved by the following holding unit until the holding unit is moved at higher speed by the action of the friction drum.
  • the drawing-off roller 51 shown in FIGS. 22 and 23, is directly driven by the motor MTR7, and the construction and movement of the roller 51 and motor MTR7 are similar to those of the above-mentioned second drawing-on roller 50' and motor MTR6.
  • the drawing-off roller 51 is arranged at the position where its surface can come into contact with the upper surface of the support member 33, and this contact relation is continued until the holding unit is moved by the driving disc 115 shown in FIG. 8. This occurs at position IV, where the suction tube 30 is then connected to the aperture of the pneumatic transferring duct 23, as shown in FIG. 1, so that the seamless hose 8 can be transported to the downstream working station by a suction air stream in the duct 23.
  • the toe-closing operation by means of the method of the present invention can be carried out by the following steps.
  • a holding unit passes position I
  • the operator picks up the welt portion of a seamless hose 8, and holds its toe end in front of the suction tube 30 of the holding unit.
  • a suction force is applied into the suction tube 30 by actuating a pneumatic system whereby the seamless hose is sucked into the suction tube 30, toe end first, while the operator holds the welt end portion of the hose 8.
  • This operation is carried out during the displacement of the holding unit from the position I, which is also C 1 to position C 2 shown in FIG. 18.
  • the suction tube 30 remains connected to the suction pipe 65, because said suction tube 30 moves synchronously with the displacement of the holding unit. Consequently, suction force is applied into the suction tube 30 when the suction system is actuated.
  • the suction tube 30 is disconnected from the suction pipe 65 and then said suction pipe 65 is returned to its position C 1 .
  • the suction force in the suction tube 30 is, of course, released when the suction tube 30 is disconnected from the suction pipe 65.
  • the operator places the welt portion of the hose 8 over the free end portion of the support member 33 of the holding unit in such a way that the welt portion partly covers the outer ends of the finger pieces 31 and 32, and the support member 33 of the suction tube 30.
  • the first drawing-on rollers 50 are mechanically lifted so that they approach and contact the underside surface of the finger pieces 31 and 32, covered by the welt portion of the hose 8, and said hose is drawn out of the aperture of the suction tube 30 and onto the outside of said tube 30 and the finger pieces 31 and 32 by the rotation of said rollers 50.
  • the hose 8 is turned inside-out. While the hose 8 is being drawn onto the suction tube 30 and the finger pieces 31 and 32, the rollers 50 are displaced from the position D 1 to the position D 2 , shown in FIG. 15, synchronously with the displacement of the holding unit from the position I to the position II.
  • said rollers 50 are freed from the finger pieces 31 and 32 and positioned as shown in FIG. 17.
  • said rollers 50 are returned to the position D 1 .
  • the position of the toe portion of the hose 8 on the finger pieces 31 and 32 can be maintained stably because of the lateral spreading out motion of the finger pieces 31 and 32. Consequently, the toe end portion of the hose 8 remains in a flatly spread out condition, as shown in position III in FIG. 2.
  • the holding unit is moved at twice the speed that it traveled before and the finger pieces 31 and 32 are further displaced along the longitudinal axis of the suction tube 30 until they reach the position shown in position III in the FIGS. 13 and 14. In the region near the position III, the holding unit is moved only by the force of the push it previously received from the chain 14. Stopper levers 71 as shown in FIG. 5 are provided on both side frames 10, so that when the recess on the stopper lever 71 comes into engagement with the stop pin 70 on the bracket 44, the movement of the holding unit can stop, and said holding unit at the position III correctly.
  • This step is similar to the conventional toe closer.
  • an air cylinder 84 is actuated so as to retract the piston rod 85 whereby backward hook member 83 on the piston rod 85 pulls the top roller 41 mounted on the back sliding member 37 toward the air cylinder 84. Consequently, the finger pieces 31 and 32 are retracted from the clamp of the upper and lower clamps 90 and 91, while the toe end of the hose 8 is held by said clamps. In this condition, the welt portion of the hose 8 is still held by said upper and lower clamps 90 and 91 as shown in position III in FIG. 2.
  • This step is also similar to the conventional toe closer.
  • the clamp 90 Upon the return of the finger pieces 31 and 32 to their normal position on the suction tube 30, the clamp 90 is turned by means of a rotary solenoid not shown in drawings. At the same time, the toe end portion of the hose 8 is stitched and closed with the sewing thread and cutting out the waste hose by the cutter on the sewing machine.
  • the upper clamp 90 is displaced upward by the solenoid and separated from the bottom clamp 91, and the closed toe end portion of the hose 8 hangs from the forward free end of the support member 33 is relaxed condition.
  • the holding unit remains stationary at the position III for a short time, for example three seconds.
  • said holding unit is moved at a higher speed than before by the rotating friction of the friction drums 75, as shown in FIGS. 5 and 13, because the outer surfaces of said friction drums 75 come into frictional contact with the stop pins on the bracket.
  • One way braking rollers 73 are mounted on both side frames 10 at the position IV, so that they act to brake and to stop the arriving holding unit at the position IV exactly.
  • the suction tube 30 is connected to the aperture of the pneumatic transferring duct 23 immediately, and seamless hose 8 is turned outside-out by the suction force in the suction tube 30 and the rotation of the roller 50' on the surface of the support member 33. That is, as the hose 8 is sucked into the suction tube 30 it is turned outside out. After being sucked into the suction tube 30 in the outside-out condition by the actions of the roller 50' and the suction force, the hose 8 is transported to the downstream working station by a suction air stream in the duct 23.
  • a main motor MTR1 for driving the toe closer, a motor MTR2 for the sewing machine, and a motor MTR3 for a suction blower are connected in parallel to a three phase electrical source.
  • a rectifier for a rotary solenoid circuit and a transformer for control circuit are connected in parallel to two of said three phases. From said rectifier, via a control circuit, the following are connected in parallel; a rotary solenoid RSO1 for closing a damper for the suction pipe 65 as shown in FIG.
  • a rotary solenoid RSO2 for lowering the clamp 90 of the sewing machine; a rotary solenoid RSO3, for turning said clamp 90 of the sewing machine and; a rotary solenoid RSO4, for the damper situated at the position of the hose to be drawn off, and controlled by a switch L7, which is actuated by the control drum.
  • a switch L2 for detecting the completion of the lifting movement of the clamp 90
  • a switch L4 for initiating the lifting movement of the first drawing-on roller 50
  • a switch L5, for initiating the lowering movement of the clamp 90
  • a switch L6, for indicating the initiation of the retracting movement of the piston rod 85. All of the above switches and the switch L7 are actuated by the rotating control drum.
  • a switch L8 for detecting the retracting length of the piston rod 85, and a switch L11 operated by the piston rod 85 for detecting the completion of the movement of the finger pieces 31 and 32 away from the clamp 90 are mounted on the forward cam plate 82 and are also connected in parallel through the control circuit to the transformer.
  • a switch L9 for detecting a hose 8 being clamped by the clamp 90, and a switch L10 for detecting the completion of the toe-closing operation for a hose are arranged on the sewing machine, and are also connected in parallel through the control circuit to the transformer.
  • the switch L4 When the holding unit reaches the position C 2 as shown in FIG. 18, the switch L4 is pushed by the control drum, and it acts to operate the rotary solenoid RSO1 so that air flow passing through the suction pipe 65 can be shut off.
  • the winding-on rollers are then lifted toward and come into contact with the finger pieces, after compressed air is supplied into the cavity 62 as shown in FIG. 16, so that the hose can be turned inside out.
  • the feeding of the compressed air is cut off from the cavity 62 and the first drawing-on rollers 50 are lowered by means of the spring 63 so that they are no longer in contact with the surface of the finger pieces 31 and 32.
  • the use of the photoelectrical detecting apparatus PR1 as shown in FIGS. 16 and 17 is optional. This apparatus detects the existence of the hose 8 on the finger pieces 31 and 32 at any given moment. If no hose is there, then the apparatus PR1 acts to prevent the lifting movement of the first drawing-on rollers 50.
  • the upper clamp 90 When the movement of the holding unit with hose 8 is stopped by the stopper lever 71, the upper clamp 90 immediately or after a time delay of 0.1 second, starts to move downwardly due to the action of the rotary solenoid RSO2 via the switch L5 actuated by the control drum. After the clamp 90 is completely lowered the retracting movement of the piston rod 85 is initiated via the switch L6 actuated by the control drum.
  • the switch L11 on the cam plate 82 is actuated by the hook member 83 on the piston rod 85 due to the retracting movement of said piston rod, the toe-closing is started by the sewing machine according to the conventional toe-closing sequence.
  • This safety circuit consists of a series arrangement of the switch L8 and the switch L3, which are actuated by the control drum, and therefore, if either of the above-mentioned switches are not actuated the machine is stopped immediately.
  • the clamp 90 When the switch L10 is pushed by a cam of the sewing machine, not shown, which indicates that the toe-closing operation is over, the clamp 90 is lifted and returned to its original stand-by position by a spring, not shown, and when the action of the rotary solenoid RSO2 is released the motor MTR is stopped.
  • the switch L2 for detecting the lifting of the clamp 90 is provided for the sewing machine so that if such lifting is not enough the machine is stopped immediately.
US05/477,824 1973-12-28 1974-06-10 Automatic method and apparatus for closing the toe of seamless hose Expired - Lifetime US3941069A (en)

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JA49-3466 1973-12-28
JP743466A JPS5416264B2 (es) 1973-12-28 1973-12-28

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US (1) US3941069A (es)
JP (1) JPS5416264B2 (es)
DE (2) DE2461691C3 (es)
ES (1) ES433400A1 (es)
FR (1) FR2256276B1 (es)
GB (1) GB1441188A (es)
IT (1) IT1027187B (es)

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120251A (en) * 1976-06-11 1978-10-17 Takatori Machinery Works, Ltd. Automatic method and apparatus for closing a toe end of a seamless hose material utilizing a straight line stitching by means of a stationarily disposed sewing machine
US4133277A (en) * 1977-08-22 1979-01-09 Speizman Industries, Inc. Stocking toe end closing apparatus
US4133280A (en) * 1976-10-26 1979-01-09 Takatori Machinery Works, Ltd. Automatic method and apparatus for closing a toe end of a hose utilizing a straight line stitch
US4192242A (en) * 1977-04-02 1980-03-11 Detexomat Machinery Limited Hosiery toe closers
EP0014430A1 (en) * 1979-01-30 1980-08-20 Takatori Machinery Works Ltd. Method and apparatus for closing the toe end of a hose
US4308980A (en) * 1979-02-07 1982-01-05 Solis S.R.L. Positioning device for tubular hose
US4364320A (en) * 1981-02-23 1982-12-21 Consolidated Foods Corporation Garment toe closing system
US4374501A (en) * 1980-07-18 1983-02-22 Consolidated Foods Corporation Garment toe closing assembly
US4383491A (en) * 1980-01-07 1983-05-17 Detexomat Machinery Limited Method and apparatus for hosiery manufacture
US4444140A (en) * 1981-12-14 1984-04-24 Monarch Knitting Machinery Corporation Method of making panty hose and apparatus to make same
US4539924A (en) * 1981-08-28 1985-09-10 Consolidated Foods Corporation Loading system for a toe closing assembly
US4598817A (en) * 1981-08-28 1986-07-08 Sara Lee Corporation Loading system for a toe closing assembly
US4602710A (en) * 1981-08-28 1986-07-29 Sara Lee Corporation Loading system for a toe closing assembly
US5040475A (en) * 1989-01-28 1991-08-20 Sara Lee Corporation Material handling system
EP0618321A1 (fr) * 1993-04-01 1994-10-05 SOLIS S.r.l. Procédé et une machine pour la couture automatique de deux bas pour former un collant
US5609118A (en) * 1994-02-11 1997-03-11 Detexomat Machinery Limited Hosiery line closer and loader assembly
US5771830A (en) * 1995-04-11 1998-06-30 Detexomat Machinery Limited Method and apparatus for manipulating a length of flexible material
US6158367A (en) * 1999-03-17 2000-12-12 B. B. & S. Knitting Consultants Apparatus and method for automatically orienting hosiery articles for closing toe ends thereof
US6334547B1 (en) 1997-07-19 2002-01-01 Detexomat Machinery Limited Method and apparatus for manipulating a length of flexible material
US20040154510A1 (en) * 2003-01-24 2004-08-12 Bb & S Knitting Consultants Apparatus and method for automatically orienting hosiery articles for closing toe ends thereof
US20040155074A1 (en) * 2003-01-24 2004-08-12 Bb&S Knitting Consultants Apparatus for automatically orienting hosiery articles for closing toe ends thereof
CN106087276A (zh) * 2016-06-28 2016-11-09 海宁市力天袜业有限公司 一种宠物袜的封口设备中的进料装置
CN106245238A (zh) * 2016-06-28 2016-12-21 海宁市力天袜业有限公司 带线筒安装装置的宠物袜封口设备中的下料装置

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0149295B1 (en) * 1984-01-19 1988-10-19 Tomotake Nakahira Apparatus for processing circular knit hosiery
EP0203243B1 (fr) * 1985-05-24 1989-01-11 SOLIS S.r.l. Procédé et dispositif pour placer automatiquement les bas tubolaires d'un collant sur les deux tubes de l'appareil de retournement pneumatique d'une machine à coudre les pointes de collant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486471A (en) * 1966-03-31 1969-12-30 Southern Textile Machinery Co Method and apparatus for seaming and inspecting hosiery
US3520262A (en) * 1967-08-23 1970-07-14 Chadbourn Gotham Inc Method and apparatus for closing stocking toes and putting stockings on boarding forms for processing
US3806009A (en) * 1970-08-24 1974-04-23 Intech Corp Method and apparatus for handling hosiery
US3859938A (en) * 1973-02-05 1975-01-14 Takatori Machinery Works Ltd Automatic apparatus for closing the toe of a seamless stocking

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3486471A (en) * 1966-03-31 1969-12-30 Southern Textile Machinery Co Method and apparatus for seaming and inspecting hosiery
US3520262A (en) * 1967-08-23 1970-07-14 Chadbourn Gotham Inc Method and apparatus for closing stocking toes and putting stockings on boarding forms for processing
US3806009A (en) * 1970-08-24 1974-04-23 Intech Corp Method and apparatus for handling hosiery
US3859938A (en) * 1973-02-05 1975-01-14 Takatori Machinery Works Ltd Automatic apparatus for closing the toe of a seamless stocking

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4120251A (en) * 1976-06-11 1978-10-17 Takatori Machinery Works, Ltd. Automatic method and apparatus for closing a toe end of a seamless hose material utilizing a straight line stitching by means of a stationarily disposed sewing machine
US4133280A (en) * 1976-10-26 1979-01-09 Takatori Machinery Works, Ltd. Automatic method and apparatus for closing a toe end of a hose utilizing a straight line stitch
US4192242A (en) * 1977-04-02 1980-03-11 Detexomat Machinery Limited Hosiery toe closers
US4133277A (en) * 1977-08-22 1979-01-09 Speizman Industries, Inc. Stocking toe end closing apparatus
EP0014430A1 (en) * 1979-01-30 1980-08-20 Takatori Machinery Works Ltd. Method and apparatus for closing the toe end of a hose
US4343254A (en) * 1979-01-30 1982-08-10 Takatori Machinery Works Ltd. Method and apparatus for closing the toe end of a hose
US4308980A (en) * 1979-02-07 1982-01-05 Solis S.R.L. Positioning device for tubular hose
US4383491A (en) * 1980-01-07 1983-05-17 Detexomat Machinery Limited Method and apparatus for hosiery manufacture
US4374501A (en) * 1980-07-18 1983-02-22 Consolidated Foods Corporation Garment toe closing assembly
US4364320A (en) * 1981-02-23 1982-12-21 Consolidated Foods Corporation Garment toe closing system
US4598817A (en) * 1981-08-28 1986-07-08 Sara Lee Corporation Loading system for a toe closing assembly
US4539924A (en) * 1981-08-28 1985-09-10 Consolidated Foods Corporation Loading system for a toe closing assembly
US4602710A (en) * 1981-08-28 1986-07-29 Sara Lee Corporation Loading system for a toe closing assembly
US4444140A (en) * 1981-12-14 1984-04-24 Monarch Knitting Machinery Corporation Method of making panty hose and apparatus to make same
US5040475A (en) * 1989-01-28 1991-08-20 Sara Lee Corporation Material handling system
EP0618321A1 (fr) * 1993-04-01 1994-10-05 SOLIS S.r.l. Procédé et une machine pour la couture automatique de deux bas pour former un collant
US5609118A (en) * 1994-02-11 1997-03-11 Detexomat Machinery Limited Hosiery line closer and loader assembly
US5771830A (en) * 1995-04-11 1998-06-30 Detexomat Machinery Limited Method and apparatus for manipulating a length of flexible material
US6334547B1 (en) 1997-07-19 2002-01-01 Detexomat Machinery Limited Method and apparatus for manipulating a length of flexible material
US6158367A (en) * 1999-03-17 2000-12-12 B. B. & S. Knitting Consultants Apparatus and method for automatically orienting hosiery articles for closing toe ends thereof
US20040154510A1 (en) * 2003-01-24 2004-08-12 Bb & S Knitting Consultants Apparatus and method for automatically orienting hosiery articles for closing toe ends thereof
US20040155074A1 (en) * 2003-01-24 2004-08-12 Bb&S Knitting Consultants Apparatus for automatically orienting hosiery articles for closing toe ends thereof
US7025011B2 (en) 2003-01-24 2006-04-11 B.B. & S Knitting Consultants Apparatus for automatically orienting hosiery articles for closing toe ends thereof
US7044071B2 (en) 2003-01-24 2006-05-16 B.B. & S Knitting Consultants Apparatus and method for automatically orienting hosiery articles for closing toe ends thereof
CN106087276A (zh) * 2016-06-28 2016-11-09 海宁市力天袜业有限公司 一种宠物袜的封口设备中的进料装置
CN106245238A (zh) * 2016-06-28 2016-12-21 海宁市力天袜业有限公司 带线筒安装装置的宠物袜封口设备中的下料装置
CN106087276B (zh) * 2016-06-28 2019-01-08 绍兴龙飞针织有限公司 一种宠物袜的封口设备中的进料装置

Also Published As

Publication number Publication date
FR2256276B1 (es) 1977-07-08
DE2461691C3 (de) 1979-01-04
JPS5416264B2 (es) 1979-06-21
GB1441188A (en) 1976-06-30
IT1027187B (it) 1978-11-20
ES433400A1 (es) 1977-05-16
DE2461691A1 (de) 1975-07-17
DE2461691B2 (de) 1978-05-11
DE2462415B2 (de) 1978-10-19
DE2462415C3 (de) 1979-06-13
JPS5095554A (es) 1975-07-30
DE2462415A1 (de) 1977-02-10
FR2256276A1 (es) 1975-07-25

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